"The man described as Client 9 in court papers arranged to meet with a prostitute who was part of the ring, Emperors Club VIP, on the night of Feb. 13. Mr. Spitzer traveled to Washington that evening, according to a person told of his travel arrangements.

"The affidavit says that Client 9 met with the woman in hotel room 871 but does not identify the hotel. Mr. Spitzer stayed at the Mayflower Hotel in Washington on Feb. 13, according to a source who was told of his travel arrangements. Room 871 at the Mayflower Hotel that evening was registered under another name.

"Federal prosecutors rarely charge clients in prostitution cases, which are generally seen as state crimes. But the Mann Act, passed by Congress in 1910 to address prostitution, human trafficking and what was viewed at the time as immorality in general, makes it a crime to transport someone between states for the purpose of prostitution. The four defendants charged in the case unsealed last week were all charged with that crime, along with several others."

“I have acted in a way that violates my obligation to my family and violates my or any sense of right or wrong,” said Mr. Spitzer, who appeared with his wife Silda at his Manhattan office. “I apologize first and most importantly to my family. I apologize to the public to whom I promised better.”

“I have disappointed and failed to live up to the standard I expected of myself. I must now dedicate some time to regain the trust of my family.”

"He declined to take questions and promised to report back soon. As he went to leave, three reporters screamed out, "Are you resigning? Are you resigning?", and Mr. Spitzer charged out of the room, slamming the door."